JPH10156128A - Rotary cylinder type gas concentrator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To use a granular adsorbent not subjected to special processing to lower costs and to prevent equipment itself from being made large. SOLUTION: In a rotary cylinder type gas concentrator 10 in which gas to be treated is fed to a freely rotatable cylinder-shaped rotor 18 equipped with an adsorbent and organic solvent in the gas to be treated is absorbed and separated to discharge purified gas, and on the other hand, a smaller quantity of regenerating gas than that of the gas to be treated is fed to a part other than the part of the rotor into which the gas to be treated is fed in the opposite direction to that of the gas to be treated to separate the separated organic solvent from the absorbent and discharge it as concentrated gas, the rotor 18 is formed into plural chambers 22 each having openings at both the ends partition plates 21 for partitioning the rotor at prescribed intervals in the peripheral direction and extended in the vertical direction and division plates 21 for partitioning a space between the adjacent partition plates in the vertical direction, and also, an adsorbent 23 is arranged so that the chamber 22 may be divided into two spaces on the upstream side and on the downstream side in the flow direction of the gas to be treated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cylindrical rotary gas concentrator for separating and concentrating an organic solvent of a gas to be treated containing an organic solvent.

[0002]

2. Description of the Related Art Conventionally, a gas to be treated containing an organic solvent is separated into a purified gas and an organic solvent by a gas concentrator, and the purified gas is exhausted, while the separated organic solvent is concentrated by a regeneration gas. And the concentrated gas is supplied to a combustion device for combustion treatment. As the gas concentrator, various types such as a honeycomb gas concentrator or a fluidized gas concentrator are provided. Among them, a honeycomb gas concentrator is generally used due to the size and operability of the device. ing.

As shown in FIG. 5, the honeycomb gas concentrator 1 employs a honeycomb-shaped rotor 2 obtained by specially processing an adsorbent such as activated carbon or zeolite for adsorbing an organic solvent. By passing the processing gas, the organic solvent in the processing gas is adsorbed and separated, and only the purified gas is exhausted. A heated regeneration gas having a smaller air flow than the gas to be treated is supplied to the rotor 2 through the supply duct 3 to the rotor 2 to which the organic solvent has been adsorbed. It is discharged as more concentrated gas.

[0004]

However, in the above-mentioned honeycomb type gas concentrator, if the adsorption power of the honeycomb-shaped rotor 2 is deteriorated with time and the adsorption efficiency is lowered, the rotor 2 itself must be replaced. However, there is a problem that the replacement operation is complicated and the cost is high. In order to prevent this, as shown in FIG. 6, a pre-activated carbon filter 5 or a roll filter 6 in which granular adsorbents are arranged in multiple stages upstream of the rotor 2 for pretreatment of the gas to be treated, Some of them suppress deterioration of the rotor 2. However, in the case of such a configuration, there is a problem that the apparatus itself becomes large and the cost is high. In addition, since the honeycomb-shaped rotor 2 is time-consuming and expensive to manufacture, if a granular adsorbent is used instead of the honeycomb-shaped rotor 2, the pressure loss when the gas to be treated or the regenerated gas passes increases, and the gas loss increases. Since the passing speed (processing efficiency) is reduced, the passing area must be increased in order to obtain the same processing efficiency as that of the honeycomb type apparatus, and there is a problem that the rotor becomes large.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and aims to reduce costs by allowing granular adsorbents to be used as they are without specially processing the adsorbents.
It is an object of the present invention to provide a new gas concentrating device that can prevent the device itself from increasing in size.

[0006]

In order to solve the above-mentioned problems, a cylindrical rotary gas concentrator according to the present invention supplies a gas to be processed to a rotatable cylindrical rotor provided with an adsorbent to thereby perform the processing. While purifying gas is discharged by adsorbing and separating the organic solvent in the gas, a smaller amount of the regeneration gas than the gas to be treated is supplied to a portion other than the gas supply portion of the rotor in the opposite direction to the gas to be treated. In a cylindrical rotary gas concentrator that separates the separated organic solvent from an adsorbent and discharges the concentrated organic gas as a concentrated gas, the rotor is separated from a vertically extending partition plate that is partitioned at predetermined intervals in a circumferential direction and the partition plate that is adjacent to the partition plate. A plurality of chambers having openings at both ends with a partition plate that partitions the chamber at predetermined intervals in the vertical direction, and divides the chamber into two spaces on the upstream side and the downstream side in the flow direction of the gas to be treated. With adsorbent It is intended. In the cylindrical rotary gas concentrator, it is preferable that the adsorbent is stored in a container formed of a gas-permeable member.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. Cylindrical rotary gas concentrator 10 of the present invention
Includes a rotor 18 and a driving device 30 for the rotor 18 inside the casing 11, as shown in FIGS.
The casing 11 is provided with a gas supply duct 40 to be treated, a purified gas exhaust duct 41, a regeneration gas supply duct 42, and a concentrated gas exhaust duct 43.

The casing 11 is provided with a rotor through hole 12.
a inside of the gas supply chamber 13
And a lower drive housing chamber 14, and a seal member 15 for sealing between the inner peripheral edge of the rotor through-hole 12 a and a lower outer peripheral surface of the rotor 18 is provided.

The rotor 18 includes a partition plate 20 disposed on the upper surface of a circular bottom plate 19 at predetermined intervals in a circumferential direction.
A chamber 22 formed by adjacent partitioning plates 20 and 20 and a partitioning plate 21 arranged at a predetermined interval in the vertical direction, and formed by the adjacent partitioning plates 20 and 20 and upper and lower partitioning plates 21 and 21. Is filled with an adsorbent 23.

The partition plate 20 has an upper edge connected to a donut-shaped top plate 25, and a sealing member 2 provided between the upper surface of the top plate 25 and the lower surface of the top plate 11a of the casing 11.
5a is provided to seal the gap. Each partition plate 21
As shown in FIG. 1 and FIG. 4, the upper partition plate 2
At the lower end 21a and the upper end 21b of the lower partition plate 21, mounting frames 26, 26 are disposed in the horizontal direction, respectively. The adsorbent 23 uses granular activated carbon or zeolite, is filled in a net-like container 27, and is disposed on the mounting frame 26 via the container 27 so as to be detachable from the outside of the rotor 18. .

The driving device 30 is, as shown in FIG.
Generally, it comprises a rotating shaft 31, wheels 32, a motor 34, a thrust bearing 35, and a guide rail 36. In particular,
A rotation shaft 31 is provided at the center of the lower surface of the bottom plate 19 of the rotor 18, and wheels 32 are rotatably mounted via brackets 33 provided at predetermined intervals on the outer periphery of the lower surface of the bottom plate 19. A motor 34, a thrust bearing 35, and a guide rail 36 are provided on a base 37, the rotating shaft 31 is rotatably supported by the thrust bearing 35, and the wheels 32 are mounted on the guide rail 36. The motor 34 and the rotating shaft 31 are connected by a belt 38 to rotate the rotating shaft 31 via the belt 38. The driving device 30 is provided with the rotor 18 disposed vertically.
Any configuration may be used as long as it can rotate.

The gas supply duct 40 to be treated has one end connected to the gas supply chamber 13 of the casing 11 and the other end connected to a coating line, a work room of a printing / adhesion factory, a coating drying furnace, or the like. is there. One end of the purified gas exhaust duct 41 is connected to the center of the top plate 11a of the casing 11 so as to communicate with the hollow portion of the rotor 18, and the other end is open to the atmosphere. The regeneration gas supply duct 42
Has one end penetrating the purified gas exhaust duct 41 and facing the inner peripheral surface of the rotor 18, while the other end is connected to a heat exchanger (not shown). Further, a seal member 44 is attached to a contact portion between the regeneration gas supply duct 42 and the inner peripheral surface of the rotor 18 and a contact portion between the regeneration gas supply duct 42 and the bottom plate 19, and among a plurality of chambers 22 formed in the rotor 18, A regeneration gas heated to a required temperature from the inside toward the outside in the radial direction can be supplied to 22. The concentrated gas discharge duct 43 is disposed so as to face the regeneration gas supply duct 43 in the radial direction with the chamber 22 of the rotor 18 interposed therebetween.
8, while the other end is connected to a combustion device (not shown). Further, the concentrated gas discharge duct 43
A seal member 45 is provided at a contact portion between one end of the rotor and the rotor 18.
Is attached.

Next, the concentration of the gas to be treated by the cylindrical rotary gas concentrator 10 will be described. First, while the rotor 18 is rotated by the driving device 30, the gas supply chamber 1 of the casing 11 is
To 3, a gas to be treated containing an organic solvent is supplied. As shown in FIG. 1, the gas to be treated is supplied to each chamber 22 from the outside in the radial direction with respect to the rotor 18, and the adsorbent 23 in each chamber 22 is supplied.
, The organic solvent contained in the gas to be treated is adsorbed and separated by the adsorbent 23, and only the purified gas is exhausted from the purified gas exhaust duct 41 through the hollow portion of the rotor 18. Further, as shown in FIG. 2, the gas to be processed passes radially from the entire outer peripheral portion of the rotor 18 excluding the portion (the adsorbent 23A) where the concentrated gas discharge duct 43 is provided.

On the other hand, from the regeneration gas supply duct 42, heated regeneration gas having a smaller air flow than the gas to be treated is supplied as shown in FIG.
As shown in (1), the gas is supplied to the adsorbent 23 outside the radially inner side of the rotor 18, that is, in the direction opposite to the gas to be treated. As a result, the adsorbed organic solvent is separated from the adsorbent 23, and the organic solvent is discharged from the concentrated gas discharge duct 43 as a concentrated gas together with the regeneration gas, and supplied to the combustion device as in the related art. At this time, as shown in FIG. 2, the adsorbent 23 (23A in the figure) provided in the chamber 22 facing the concentrated gas discharge duct 43 has the organic material adsorbed and separated during the rotation from the position a to the position b. Since the solvent is accumulated and separated by the regeneration gas having a smaller air flow than the gas to be treated, the concentration of the organic solvent is about 10 to 20 times that of the gas to be treated. As described above, in the cylindrical rotary gas concentrator 10, by supplying the gas to be treated and the regeneration gas while rotating the rotor 18 by the driving device 30, the organic solvent in the gas to be treated is continuously concentrated. I do.

When the adsorbent 23 deteriorates while the concentration process is continued, and the adsorbing ability is reduced, only the adsorbent 23 in the container 27 of the chamber 22 formed in the rotor 18 needs to be replaced. Since the container 27 is merely placed on the mounting frame 26 provided in the chamber 22, it can be easily replaced.

When a granular adsorbent 23 is used as the adsorbent 23, the resistance at the time of passage increases, so that the adsorbent 23 is not used.
Although the gas passing rate through the gas decreases and the gas throughput decreases, a large number of chambers 22 are formed in the rotor 18 and the rotor 18
Since the entire gas passage area is greatly increased, it is possible to prevent the processing efficiency from decreasing.

The cylindrical rotary gas concentrator 10 of the present invention is not limited to the above-described configuration.
While the gas to be treated is supplied radially outward from the rotor 18 to the rotor 18 to adsorb and separate the organic solvent, while the regeneration gas is directed radially inward from the rotor 18 outside. It may be configured to be supplied and discharged as a concentrated gas with a small air volume together with the organic solvent. The container 27 is not limited to a net-like member, and may be made of any material such as a punched metal or a non-woven fabric that can pass gas and can hold the granular adsorbent 23. Further, the partition plate 21
And the upper and lower dividers 2
The passage area of the gas to be treated may be further increased by arranging the container 27 at an angle between the positions 21 and 21.

In the concentrating device 10, the container 27
Is detachable, but the same effect can be obtained even if the container 27 is provided integrally with each chamber 22 and only the adsorbent 23 is filled. Furthermore, without using the container 27,
A sheet-like material in which a granular adsorbent 23 is fixed between two nonwoven fabrics may be used. Further, the concentrator 10 has a two-chamber structure in which the partition 12 is divided into a gas supply chamber 13 and a drive device accommodating chamber 14, but the present invention is applied to the bottom plate 19 and the top plate 25 of the rotor 18 as described above. The gas to be treated and the purified gas, or the gas to be treated and the concentrated gas are not mixed by the seal member 25a of the above or the seal member 45 of the concentrated gas discharge duct 43, so that the partition wall 12 is not provided. There is no problem with a single-chamber structure.

[0019]

As is apparent from the above description, in the cylindrical rotary gas concentrator of the present invention, a large number of chambers are formed in the cylindrical rotor, and each chamber is connected to the upstream side in the flow direction of the gas to be treated. Since the adsorbent is arranged so as to be divided into two spaces on the downstream side, even if a granular adsorbent is used, the passage area between the gas to be treated and the adsorbent can be increased without increasing the size of the rotor. Therefore, even if the gas passing speed is reduced due to the use of the granular adsorbent, it is possible to prevent a reduction in the processing efficiency of the gas to be processed. In addition, by adopting a configuration in which the adsorbent is housed and disposed in a container made of a gas-permeable member, even if the adsorbent deteriorates with time, there is no need to replace the entire rotor, and only the adsorbent is used. The replacement work can be simplified. Accordingly, a pretreatment adsorbent for suppressing deterioration of the rotor is not required, so that the total cost can be significantly reduced as compared with a honeycomb gas concentrator. That is, by using the granular adsorbent, the same processing effect can be obtained with the same size as that of the honeycomb rotor.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a cylindrical rotary gas concentrator according to the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a partial sectional perspective view of FIG.

FIG. 4 is an exploded perspective view of a main part of the rotor.

FIG. 5 is a perspective view showing a conventional honeycomb gas concentrator.

FIG. 6 is a perspective view showing a gas concentrator using the honeycomb concentrator of FIG.

[Explanation of symbols]

10: cylindrical rotary gas concentrator, 11: casing, 1
3 ... gas supply chamber, 14 ... drive device accommodation chamber, 18 ... rotor, 19 ... bottom plate, 20 ... partition plate, 21 ... partition plate, 22 ...
Chamber 23 Adsorbent 27 Container 30 Drive 31
... Rotating shaft, 32 ... Wheel, 34 ... Motor, 35 ... Thrust bearing, 36 ... Guide rail, 40 ... Treatment gas supply duct, 41 ... Purification gas exhaust duct, 42 ... Regeneration gas supply duct, 43 ... Concentrated gas discharge duct .

Claims (2)

[Claims] 1. A gas to be treated is supplied to a rotatable cylindrical rotor having an adsorbent, an organic solvent in the gas to be treated is adsorbed and separated, and a purified gas is discharged. A cylindrical rotary gas concentrator that supplies a smaller amount of regenerating gas than the gas to be treated to the portion other than the gas supply portion in the opposite direction to the gas to be treated, separates the separated organic solvent from the adsorbent, and discharges it as a concentrated gas. In the apparatus, a plurality of chambers having openings at both ends by a vertically extending partition plate that partitions the rotor at a predetermined interval in the circumferential direction and a partition plate that partitions the adjacent partition plates at a predetermined interval in the vertical direction. A cylindrical rotary gas concentrator characterized in that an adsorbent is formed so as to be formed and divided into two spaces on the upstream side and the downstream side in the flow direction of the gas to be treated. 2. The cylindrical rotary gas concentrator according to claim 1, wherein the adsorbent is housed in a container made of a gas-permeable member.